ES269702A1 - Improvements in or relating to cellulosic sponge material - Google Patents
Improvements in or relating to cellulosic sponge materialInfo
- Publication number
- ES269702A1 ES269702A1 ES0269702A ES269702A ES269702A1 ES 269702 A1 ES269702 A1 ES 269702A1 ES 0269702 A ES0269702 A ES 0269702A ES 269702 A ES269702 A ES 269702A ES 269702 A1 ES269702 A1 ES 269702A1
- Authority
- ES
- Spain
- Prior art keywords
- groups
- cellulose
- yield
- sponge material
- ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/08—Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/16—Organic material
- B01J39/18—Macromolecular compounds
- B01J39/22—Cellulose or wood; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
Abstract
A cellulosic sponge material is treated with a reagent capable of reacting with the hydroxyl groups of the cellulose to provide groups attached to the cellulosic structure, which groups have inherently ion-exchange properties. An oxyacid of phosphorus, e.g. orthophosphoric acid, may be used to provide a phosphorylated cellulosic sponge material, the reaction conditions preferably being such as to provide a product having an ion-exchange capacity of 0,5-10 meq./g. Phosphorylation may be effected by saturating cellulose with a mixture of urea and orthophosphoric acid, squeezing out most of the reagent, curing the treated cellulose in an oven at 130 DEG C. for 2-3 hours, and then washing out unreacted reagent. Other reagents which may be used include citric acid yielding citrate groups attached to the cellulose, and mixtures of strong alkali with either (a) sodium chloroacetate, to yield carboxymethyl groups, (b) aminoethylsulphuric acid, to yield aminoethyl groups, (c) 2-chlorotriethylamine hydrochloride, to yield diethylaminoethyl groups, or (d) a mixture of epichlorhydrin and triethanolamine, to yield basic groups containing tertiary nitrogen. The cellulosic sponge material may be in block or sheet form and may contain scrim or fibrous reinforcing material. It may be prepared by rolling out a crystal paste of viscose and regenerating the viscose by conventional means. Materials so made have a high ion-exchange capacity and good structural rigidity, and liquids flow through such materials rapidly.ALSO:A cellulosic sponge material is treated with a reagent capable of reacting with the hydroxyl groups of the cellulose to provide groups attached to the cellulosic structure, which groups have inherently ion-exchange properties. An oxyacid of phosphorus, e.g. orthophosphoric acid, may be used to provide a phosphorylated cellulosic sponge material, the reaction conditions preferably being such as to provide a product having an ion-exchange capacity of 0,5-10 meq./g. Phosphorylation may be effected by saturating cellulose with a mixture of urea and othophosphoric acid, squeezing out most of the reagent, curing the treated cellulose in an oven at 130 DEG C. for 2-3 hours, and then washing out unreacted reagent. Other reagents which may be used include citric acid yielding citrate groups attached to the cellulose, and mixtures of strong alkali with either (a) sodium chloroacetate, to yield carboxymethyl groups, (b) aminoethylsulphuric acid, to yield aminoethyl groups, (c) 2-chlorotriethylamine hydrochloride, to yield diethyl aminoethyl groups, or (d) a mixture of epichlorhydrin and triethanolamine, to yield basic groups containing tertiary nitrogen. The cellulosic sponge material may be in block or sheet form and may contain scrim or fibrous reinforcing material. It may be prepared by rolling out a crystal paste of viscose and regenerating the viscose by conventional means. Materials so made have a high ion-exchange capacity and good structural rigidity, and liquids flow through such materials rapidly.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2822860A GB914421A (en) | 1960-08-15 | 1960-08-15 | Improvements in or relating to cellulosic sponge material |
Publications (1)
Publication Number | Publication Date |
---|---|
ES269702A1 true ES269702A1 (en) | 1961-12-16 |
Family
ID=10272350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES0269702A Expired ES269702A1 (en) | 1960-08-15 | 1961-08-09 | Improvements in or relating to cellulosic sponge material |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1443119A1 (en) |
ES (1) | ES269702A1 (en) |
GB (1) | GB914421A (en) |
NL (1) | NL268197A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5690996A (en) * | 1992-11-02 | 1997-11-25 | Sepragen | Cross-linked cellulose sponge |
GB9821783D0 (en) | 1998-10-06 | 1998-12-02 | Bioprocessing Ltd | Adsorbent medium |
DE19924435A1 (en) * | 1999-05-28 | 2000-11-30 | Eisu Innovative Ges Fuer Techn | Filters made of filter paper or paper-like nonwoven |
WO2006002395A2 (en) | 2004-06-24 | 2006-01-05 | Jeffrey Sherwood | Scent devices and methods |
US9132204B2 (en) | 2010-03-31 | 2015-09-15 | Enviroscent, Inc. | Methods, compositions and articles for olfactory-active substances |
US9149552B1 (en) | 2014-09-29 | 2015-10-06 | Enviroscent, Inc. | Coating providing modulated release of volatile compositions |
US10596290B2 (en) | 2015-06-09 | 2020-03-24 | Enviroscent, Inc. | Formed three-dimensional matrix and associated coating providing modulated release of volatile compositions |
USD800286S1 (en) | 2015-07-31 | 2017-10-17 | Enviroscent, Inc. | Collection of scent-infused wound sheets |
CN114010831A (en) | 2016-09-30 | 2022-02-08 | 伊万尔森特公司 | Articles formed with a slurry base material having modified odor release |
-
1960
- 1960-08-15 GB GB2822860A patent/GB914421A/en not_active Expired
-
1961
- 1961-08-09 ES ES0269702A patent/ES269702A1/en not_active Expired
- 1961-08-14 DE DE19611443119 patent/DE1443119A1/en active Pending
- 1961-08-14 NL NL268197A patent/NL268197A/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL268197A (en) | 1964-06-25 |
GB914421A (en) | 1963-01-02 |
DE1443119A1 (en) | 1968-10-10 |
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